Bobbin-clutching means for rotatable spindles



March 17,1931. w p5 1,796,770

BOBBIN CLUTCHING MEANS FOR ROTATABLE SPINDLES Filed July 23, 1929 \nvenkn: 27 Wallace; Lsfimpson byWMI W Afiys upon the blade so as to rock radially thereof; second, suitable means for limiting the outward movement of the upper ends of the clutch members; and, third, means, such as an annular contractile spring, located in the recess of the whirl acting upon the exterior of-the' clutch members yieldingly to press their lower ends toward the blade.

In the preferred construction illustrated, the clutch members are positioned circumferentially of the blade and the outward radial movement of the upper ends of the clutch members is limited and the structure is pro tected against collection of fly and lint by a sleeve of similar construction to that disclosed in the patent to Miller, No. 1,647,109, October 25, 1927. This sleeve 7 is a onepiece structure comprising a head portion 8 having an axial bore which fits the blade 1 with a driving fit. From the head portion 8 of the sleeve depends a plurality of similar symmetrically disposed circumferentially separated fingers 9 thus forming between the fingers a'plurality of symmetrically disposed similar vertical slotswhich extend to the lower end of the sleeve. The side walls 10 of these fingers lie in planes parallel to the planes which extend radially midway the slots formed between the fingers. The exterior surface of the head 8 in the sections 11 which are directly above the slots between the fingers lies in or inside of the planes defined by the exterior edges 12 of the walls of adjacent fingers. This prevents any of the yarn in a mass of yarnaccidentally wound on the bare spindle from catching as it is slid up over the bare sleeve. The sleeve is secured on the spindle preferably with a driving fit and with the lower ends of the fingers extending into the recess 3 of the whirl." Y

The bobbin clutching members, in the form illustrated, are severally mounted in the slots of the sleeve 7, are seated at their lower ends in the recess 3, andextend at their upper ends.

interiorly of the sleeve and are fulcrumed between their ends upon the blade so as to rock radially thereof in the sleeve slots. These clutch members 13 present exterior cylindrical surfaces adapted tofit the bobbin bore and the side walls of these clutching members fit snugly against the walls 12 0f as great as the limit of radial movement of the clutch member will permit. This ren' ders each clutch member apparently heavy so that the centrifugal force exerted thereupon during the high speed of rotation of the spindle will act to increase the clutching action on the bobbin. The main feature relied upon for effecting the clutching action is a yielding means located in the recess 3 of the whirl exteriorly of theyclutching members and acting to press their lower ends toward the blade. Such a yielding means is shown as an annular helical contractile spring 17 resting on the feet 15 and held from displacement by the flange 5 of the cap 4 of the whirl.

It will be seen that in this construction it is impossible for the clutch members to get out of position concentric with the blade because they fulcrum directly on the blade and there is no yielding element interposed between the clutch members and the blade.

The construction illustrated in Fig. 4 is similar to that described excepting that the clutch members 18 are shown of substantially uniform thickness and fulcrumed between their ends at 19 on a ferrule 20 having a sharp fulcrum edge 21 and rigidly secured to the blade 1 so as to form a functional part thereof. The contractile spring 22 is also shown as a split ring.

The construction shown in Fig. 5 is also similar to that shown in Figs. 1, 2 and 3, except that in this case the clutch members 23 have no outwardly projecting feet at the bot: tom as such feet are not essential in many cases, the sleeve acting to hold the clutch members in longitudinal position and the contractile spring 24 being positioned by the flange 25 of the whirl cap.

In the construction illustrated in Fig.6, a further means is shown for maintainingthe longitudinal position of the clutch members and insuring against their upward .movement. In this case the sleeve 26 is constructed as already described, but the lower ends 27 i of the sleeve segments or fingers, 28 do not extend quite to the bottom of the recess in. the whirl and the clutch'members 29 are extended circumferentially at 30 beneath the lower ends of the sleeve segments so thatthe clutchingmembers are thus prevented from having any undesirable upward movement.

In each of the forms thus described there is thus presented a spindle of great simplicity of construction, having no parts likely 'to get out of order, in which the clutch-members fulcrum upon the spindle blade so as to insure their concentricity with the blade under all conditions, in which no yielding means is interposed between the blade and the clutch members, and in which the entire construction isrugged. e

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is: .r.

sleeve and fulcrumed between their ends upon the blade to rock radially thereof in the sleeve slots, and means located in the said recess for yieldingly and exteriorly pressing the lower ends of the clutch members toward the blade.

2. A rotatable spindle comprising the construction defined inclaim 1, in which the lower ends of the clutch members are extended circumferentially beneath the lower ends of the segments of the sleeve between the slots to prevent upward movement of the clutch members.

3. A rotatable spindle comprising a blade, a whirl secured to the blade having an an nular recess in its upper face concentric the blade, a sleeve concentric the blade and secured at its upper end thereto and having a plurality of symmetrically disposed similar vertical slots extending to the lower end thereof, a plurality of similar rigid clutch members mounted one in each sleeve slot, seated at their lower ends in said recess, extending at their upper ends interiorly of the sleeve and fulcrumed between their ends upon the blade to rock radially thereof in the sleeve slots, and an annular contractile spring located in the said recess exteriorly of the clutch members and acting yieldingly to press the lower ends of the clutch members toward the blade.

at. A rotatable spindle comprising a blade, a whirl secured to the blade having an annular recess in its upper face concentric the blade, a sleeve concentric the blade and secured at its upper end thereto and having a plurality of symmetrically disposed similar vertical slots extending to the lower end thereof, a plurality of similar rigid clutch members mounted one in each sleeve slot, seated at their lower ends in said recess, extending at their upper ends interiorly of the sleeve and fulcrumed between their ends upon the blade to rock radially thereof in the sleeve slots, and an annular helical con tractile spring located in the said recess exteriorly of the clutch members and acting yieldingly to press the lower ends of the clutch members toward the blade.

5. A rotatable spindle comprising a blade, a whirl secured to the blade having an annular recess in its upper face concentric the blade, a plurality of similar rigid clutch members extending longitudinally of the blade, having their lower ends located in the said recess and fulcrumed between their ends upon the blade to rock radially thereof, means located in the said recess for yieldingly and exteriorly pressing the lower ends of the clutch members toward the blade, and means on the blade for limiting the radial outward movement of the upper ends of the clutch members.

6. A rotatable spindle comprising a blade, a whirl secured to the blade having an annular recess in its upper face concentric the blade, a plurality of similar rigid clutch members extending longitudinally of the blade, having their lower ends located in the said recess and fulcrumed between their ends upon the blade to rock radially thereof, an annular contractile spring located in the recess exteriorly of the lower ends of the clutch members and acting yieldinglyi to press them toward the blade, and means on the blade for limiting the radial outward movement of the upper ends of the clutch members.

7. A rotatable spindle comprising a blade, a whirl secured to the blade having an annular recess in its upper face concentric the blade, a sleeve concentric the blade and rotatable with the blade and whirl and having a plurality of symmetrically disposed vertical slots, a plurality of similar rigid clutch members mounted one in each sleeve slot, seated at their lower ends in the said whirl recess and in all positions fulcrumed between their ends upon the blade so as to rock in the sleeve slots radially of the blade upon their respective fulcrums, and means located in the whirl recess for yieldingly and exteriorly pressing the lower ends of the clutch members toward the blade.

8. A rotatable spindle comprising a blade, a whirl secured to the blade having an annular recess in'its upper face concentric the blade, a plurality of similar rigid clutch members extending longitudinally of the blade, having their lower ends located in the said recess and fulcrumed between their ends upon the blade to rock radially thereof, means located in the said recess for yieldingly and exteriorly pressing the lower ends of the clutch members toward the blade, and means for limiting the radial rocking movement of the clutch members in the direction carrying the upper ends outward.

In testimony whereof, I have signed my name to this specification.

WALLACE I. STIMPSON. 

